Comment on Howto Remove (delist) your mail server IP from Hotmail, Live.com and MSN mail server blacklist by EJHost.
Much appreciated for posting this..
I recently changed ips and one of the new ips had a rating, that is triggering this false positive.
I submitted the final form and the MS engineers got right back to me after investigating that my ip has a negative rating with Symantec Brightmail. They are going to inquire directly with Symantec
Appears that this should clear up the issue I'm having. So thank you for the good lead